Whats New In Spring Boot 2

What's new in Spring Boot 2.0

Boot 2.0 should come out the end of Feb

• Java 8 + only

Reactive

Non-blocking Event Driven at the center more scalability than speed

Project Reactor and Reactive Streams

Two Types:

• Mono - Basically a single item future
• Flux - A producer of future items

There is a spring-boot-starter-webflux and it uses netty as the default.

Changes to Boot

###Configuration Properties

• Relaxed binding stays the same
• Uniform format for reading properties
  • Elements seperated by dots
  • must be alpha-numeric
  • must be lowercase
  • hyphen can be used to seperate words
• Consistent behavior for Collections
• You can provide dots and array indexes with underscores in env vars
• They added more types like Duration 1s, 2m, 5d
• Origin support - Tells you where a property came from

Gradle Plugin

• bootRepackage replaced by bootJar abd bootWar
• Explicit dependency management that you have to enable.

Actuator Endpoints

You used to have to write seperate implementation for http or jmx if you wanted to expose something.

• @Endpoint, @ReadOperation, @WriteOperation, @DeleteOperation, @EndpointWebExtention
• Works with MVC, Jersey and Spring WebFlux

What's still evolving

• Metrics
  • Exist in Boot 1.5
  • Migrating to Micrometer
  • Hierarchical metrics replaced by dimensional metrics
  • Facade over multiple monitoring systems
• Security
  • Simplified security auto-configuration
  • The health and info endpoints are open to the world
  • Just add your own WebSecurityConfigurereAdapter to override.
  • OAuth 2.0
    • moved to the new Spring Security 5.0 OAuth
    • support for multiple client registrations
    • Authorization server/resource serrver support